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Biology Midterm Study Set
Biology Midterms Study Guide FML
32
Biology
9th Grade
01/18/2010

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Cards

Term
What are the steps of the scientific method?
Definition
1. Observation
2. Hypothesis
3. Prediction
4. Experiment
5. Analyze Data
6. Communitcate
Term
What is the structure of an atom?
Definition
1. Proton
2. Neutron
3. Electron
4. Electron Cloud
Term
Define atom
Definition
The simplest particle of an element that still retains all of the properties
Term
Define proton
Definition
A subatomic particle. Has a positive charge. Located in the nucleus
Term
Define neutron
Definition
A subatomic particle. No charge. Located in the nucleus
Term
Define electron
Definition
A subatomic particle. Negative charge. Located outside the nucleus
Term
Define atomic number
Definition
The number of protons in the nucleus of an atom
Term
Define mass number
Definition
The total number of protons and neutrons in the nucleus
Term
Define isotope
Definition
An atom that has the same atomic number as other atoms but a different atomic mass
Term
Why do atoms form chemical bonds?
Definition
To become stable
Term
Define molecule
Definition
A group of atoms that are held together by chemical force
Term
Define compound
Definition
A substance made up of atoms of two or more different elements joined by chemical bonds
Term
Define mixture
Definition
A combination of two or more substances that are not chemically combined
Term
What are the characteristics of living things?
Definition
1. Organization and cells
2. Response to stimuli
3. Homeostasis
4. Metabolism
5. Growth and Development
6. Reproduction
7. Change Over Time
Term
What is an ionic bond?
Definition
The attractive force between oppositely charged ions
Term
What is a covalent bond?
Definition
A bond formed when atoms share one or more pairs of electrons
Term
What is a hydrogen bond?
Definition
The force of attraction between a hydrogen molecule with a partial positive charge and an atom/molecule with a partial/full negative charge
Term
What is the difference between acids and bases?
Definition
Acids have more hydronium ions than hydroxide ions. Bases have more hydroxide ions than hydronium ions.
Term
What is the most common element in living things?
Definition
Hydrogen
Term
What does it mean to be a polar compound?
Definition
It means to be a compound whose molecules have a negative charge on one side and a positive charge on the other
Term
What are organic compounds?
Definition
Organic compounds are compounds made primarily of carbon atoms
Term
What is a carbohydrate and what are they used for in the body?
Definition
Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen. Some carbohydrates work as a source of energy while others work as structural material
Term
Define saccharides
Definition
Sugars (monosaccharides, disaccharides, polysaccharides)
Term
What are the three categories of lipids?
Definition
1. Fats
2. Steroids
3. Phospholipids
Term
What make up proteins?
Definition
Amino acids
Term
What are some uses of proteins?
Definition
Hair, horns, skin, muscles
Term
What can effect enzyme activity?
Definition
pH, heat
Term
What are the three parts of the cell theory?
Definition
1. All living organisms are composed of one or more cells
2. Cells are the basic units of structure and function in an organism
3. Cells come only from the reproduction of already existing cells
Term
What is the difference between prokaryotic and eukaryotic cells?
Definition
Prokaryotes lack a membrane-bound nucleus and membrane-bound organelles
Term
What is the difference between plant and animal cells?
Definition
Plant cells have a cell wall, chloroplast, chlorophyll, and a central vacuole
Term
What is the structure and function of the nucleus?
Definition
The nucleus is made up of the nucleolus and nuclear envelope. The nucleus works as the brain of the cell and houses all genetic material
Term
List two organelles that play a role in cell movement
Definition
1. Cilia
2. Flagella
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